bundles / scipy 2.0.0.dev0+git20260907.41eeb59 / scipy / linalg / _flapack / dsytri

lapack_function

`scipy.linalg._flapack:dsytri`

source: build-install/usr/lib/python3.14/site-packages/scipy/linalg/_flapack.cpython-314-x86_64-linux-gnu.so

Signature

def dsytri(a, ipiv, lower = 0, overwrite_a = 0)

Summary

Invert a symmetric indefinite matrix from the factorization computed by sytrf (LAPACK dsytri).

Parameters

a : ndarray: The factorization, as returned by the corresponding *trf.
ipiv : ndarray: Pivot indices from the Bunch-Kaufman factorization, 1-based exactly as sytrf/hetrf returned them -- this group shifts at neither end.
lower : int, optional: If nonzero, the lower triangle of a is referenced; otherwise the upper. Default is 0.
overwrite_a : int, optional: If nonzero, a may be overwritten in place. Default is 0.

Returns

inv_a : ndarray: The inverse, stored in the selected triangle only; the opposite triangle is left as it was.
info : int: 0 on success; if negative, the -info-th argument had an illegal value; if positive, d[info-1, info-1] is zero and the inverse does not exist.

Aliases

scipy.linalg._flapack.dsytri